/Engine/Source/Runtime/RenderCore/Public/ShaderPipelineCache.h
Gets the event delegate to register to to be notified when all currently viable PSOs have been precompiled from the cache.
static [FShaderPrecompilationCompleteDelegate](API\Runtime\RenderCore\FShaderPipelineCache\FShaderPrecompilationCompleteDel-) & GetPrecompilationCompleteDelegate()